From an unused root probably meaning to polish; the (human) skin (as smooth) -- skin.
H1539. geled
[גֶּ֫לֶד] noun masculine skin (Arabic , Aramaic גִּלְדָּא, ) of man Job 16:15 גִלְדִּ֑י עֲלֵי תָּפַרְתִּי שַׂק.